Checking hours…Mon–Fri 7:30am–5pm · Sat 9am–12pm01302 279234Trade account
Sentinel Internal Leak Sealer 1Ltr PS 813900

Sentinel

Sentinel Internal Leak Sealer 1Ltr PS 813900

Sentinel Internal Leak Sealer, 1 litre, is added to heating system water to seal minor internal leaks.

At a glance

  • Also known as 2300020
Manufacturer part no.
813900
Showing prices

£14.69

£12.24 ex. VAT · VAT at 20%

Available to order · 1 working day
Available to order · 1 working day
Not certain it's the right part? The technical team verifies fitment before dispatch — no charge, and it stops a second trip.Call the technical teamSend a technical question

Same-day dispatch

Ordered by 4pm Mon–Fri, 10:30am Sat.

30-day returns

Unused, in original packaging.

What it is

Sentinel Internal Leak Sealer 1Ltr PS is a heating system treatment supplied by Sentinel in a 1 litre container. It is added to the system water to seal minor internal leaks from within the pipework and components. It is a trade consumable rather than an appliance spare part.

Before you order

  • Confirm the system volume and dose rate against the instructions supplied with the product before treating.
  • Check whether the system already contains other chemical treatments, as compatibility should be verified before adding a sealer.
  • Establish that the leak is minor and internal; a sealer is not a repair for failed components, joints or visible pipework leaks.
  • Verify the part number 813900 against the existing stock record or order sheet.

Not sure which part?

Search by part number, product name or brand — our technical team confirms fitment before anything is dispatched.